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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARIELLE PETRILLI RN, FNP
NPI 1689183808
Nurse Practitioner in Boston, MA

Active since September 20, 2017PECOS Enrolled
121 CHARLES ST, BOSTON, MA 02114(857) 452-1501 Get Directions Write a Review

NPPES record last updated: October 15, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 15, 2026, Nov 11, 2019, Jul 17, 2018 and 1 more (4 updates tracked since 2017).

About Marielle Petrilli Rn, Fnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARIELLE PETRILLI RN, FNP (NPI 1689183808) is an individual nurse practitioner in Boston, Massachusetts, licensed in Massachusetts (RN2306198) and active in the NPI registry since September 2017. She is enrolled in Medicare PECOS and maintains a secondary practice location in Charlestown.

NPPES Registry Identity

NPI1689183808
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMARIELLE PETRILLICredential: RN, FNP
Location Address121 CHARLES STBoston, MA 02114-3256
Mailing Address121 Charles StBoston, MA 02114-3256 · (857) 452-1501
Phone(857) 452-1501
Sole ProprietorNo
Enumeration DateSeptember 20, 2017
Last NPPES UpdateOctober 15, 20264 updates tracked since enumeration
NPPES CertifiedOctober 15, 2026
✔ NPI 1689183808 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in MA · RN2306198
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
121 CHARLES ST, Boston, MA 02114
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Secondary Practice Location 1

Location 169 Main StCharlestown, MA 02129-3738 · Phone (857) 452-1501

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marielle Petrilli Rn, Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Marielle Petrilli reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The General Hospital Corporation
0.3 mi
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000
Massachusetts General Physicians Organization Inc
0.3 mi
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
Mass General Brigham Community Physicians Inc.
0.7 mi
Family Medicine
53 STATE ST STE 106
Boston, MA 02109
  • Reassigned Medicare billing, Massachusetts enrollment
  • 350 clinicians in this Medicare group
NPI 1265094122 (617) 903-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
79 services68 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
65 services62 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
39 services39 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
28 services28 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marielle Petrilli's NPI number?

The NPI number for Marielle Petrilli is 1689183808. It was assigned to this individual provider in the NPPES registry on September 20, 2017.

Where is Marielle Petrilli located?

Marielle Petrilli practices at 121 Charles St, Boston, MA 02114. The listed phone number is (857) 452-1501.

What is Marielle Petrilli's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Marielle Petrilli enrolled in Medicare?

Yes. Marielle Petrilli is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marielle Petrilli's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marielle Petrilli reassigns Medicare benefits to 3 organizations: The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA) and Mass General Brigham Community Physicians Inc. (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marielle Petrilli's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marielle Petrilli accept?

Health plans from Taro Health list Marielle Petrilli as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Marielle Petrilli was last updated on October 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.